فایل: شماره شناسایی
pdf برای دانلود کردن این فایل، لطفا وارد سیستم شویدIn this lesson, students learn about major landforms (e.g., mountains, rivers, plains, valleys, canyons and plateaus) and how they occur on the Earth's surface. They also learn about the design of transportation systems, mining, mapping and measuring natural hazards.
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